Rebar chair base



FIG. 1 is a top plan view of the rebar chair base showing our new design;

FIG. 2 is a front elevation view of the rebar chair base;

FIG. 3 is a rear elevation view of the rebar chair base;

FIG. 4 is a first side elevation view of the rebar chair base;

FIG. 5 is a second side elevation view of the rebar chair base; and,

FIG. 6 is a bottom plan view of the rebar chair base.

The broken lines in the figures show portions of the rebar chair base with a number of opening that form no part of the claimed design. 

CLAIM The ornamental design for a rebar chair base, as shown and described. 